What are 2 examples of the principle of specificity?

The principle of specificity states that training adaptations are specific to the type of exercise performed. For example, a sprinter will develop greater speed and power in short-distance running due to training that focuses on explosive movements, while a marathon runner will enhance endurance through long-distance running sessions. Additionally, strength training for a specific muscle group, such as the biceps through targeted curls, will lead to improved performance in activities that require bicep strength.